Specifications, Mechanical: Pistons

WARNING: This page is about a different car, the 2001 Volvo C70, 2000 Volvo C70, and 1999 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Piston Measurements

Courtesy of VOLVO CARS OF NORTH AMERICA.

Piston Diameter (D)

Standard	B5204T/B5234T	B5254T
C-marked ........mm	80.98-80.99	82.98-82.99
D-marked ........mm	80.99-81.00	82.99-83.00
E-marked ........mm	81.00-81.01	83.00-83.01

Fig 2: Identifying Running Clearance Of Piston

Courtesy of VOLVO CARS OF NORTH AMERICA.

Piston Running Clearance (Example)

Measured cylinder diameter	81.015 mm
Measured piston diameter	80.995 mm
The piston running clearance is	0.020 mm
The piston running clearance must be 0.010-0.030 mm.	-

Piston rings

Fig 3: Checking Piston Ring Axial Clearance

Courtesy of VOLVO CARS OF NORTH AMERICA.

Axial Clearance

Upper compression ring........0.050-0.090 mm

Lower compression ring........0.030-0.070 mm

Oil ring........0.020-0.060 mm

Dimensions

Upper compression ring........1.2 mm

Lower compression ring........1.75 mm

Oil ring........3.0 mm

Wrist Pin, Diameter

All........23.0 +0/-0.004 mm